I had expected to come over to see you last night, but someone ______ and I couldn’t get away.

A．called

B．had called

C．would call

D．would have called

最常见的良性骨肿瘤为（）

A.骨髓瘤

B.骨软骨瘤

C.骨巨细胞瘤

D.骨囊肿

E.骨瘤